The One Punch Man (a.k.a Saitama) in Demon Slayer

The battlefield was a mess. Trees were uprooted, the ground had cracks as deep as canyons, and the very air itself was shaking from the sheer power of the two fighters.

The Hashira and Demon Slayers could only watch, their bodies frozen in both awe and fear.

Muichiro narrowed his eyes. "Even after taking a full-power punch… he's still standing?"

Zenitsu gulped. "I-I'm gonna faint…"

Rengoku clenched his fists. "This is beyond any battle we've ever witnessed."

Tanjiro, meanwhile, was focused on Saitama's expression.

For the first time since they met… Saitama looked slightly serious.

---

Raizen's True Strength

Raizen chuckled, flexing his clawed hand. "Heh. That one actually hurt."

His black markings glowed brighter, and his body bulged with even more power. The cracks in his skin sealed themselves, and his regeneration sped up.

"I told you, Saitama…" Raizen grinned, his fangs sharper than ever. "I ADAPT."

Saitama raised an eyebrow. "Yeah, yeah… you and every other overpowered villain I've punched."

Raizen disappeared.

BOOM!

Before anyone could react, Saitama was launched into the sky!

The ground where he had been standing shattered completely, leaving a massive crater.

Zenitsu screamed. "DID HE JUST—?!"

Rengoku's eyes widened. "Saitama-dono was—knocked back?!"

Tanjiro gasped. "Impossible…!"

But before the thought could even sink in—

BOOM!

Saitama landed back down, completely unharmed.

He dusted off his cape, looking slightly annoyed. "Okay. Now you're starting to get on my nerves."

---

Saitama Gets Serious

Raizen smirked. "Oh? Are you actually taking me seriously now?"

Saitama cracked his knuckles. "A little."

The air around him shifted.

The Hashira felt it immediately. A pressure so intense it made even Rengoku, the strongest among them, take a step back.

Muichiro's fingers trembled. "What… what is this feeling?"

Tanjiro's nose burned as he inhaled—Saitama's presence was unlike anything he had ever sensed before.

Even Raizen, for the first time, looked slightly uneasy.

Saitama bent his knees slightly, getting into stance.

"Alright, let's get this over with."

BOOM!

He disappeared.

Raizen barely had time to react—

CRACK!

Saitama's punch connected squarely with Raizen's gut.

The demon's entire body bent inward, veins bulging from the sheer force of the blow.

A shockwave exploded outward, leveling an entire forest in the distance.

Raizen's eyes bulged.

Blood gushed from his mouth.

For a moment, time itself seemed to stop.

Then—

BOOOOOOM!!!!

Raizen was blasted backward at supersonic speeds, crashing through seven mountains.

The impact was so strong that the ground itself cracked for miles.

Silence.

The Hashira were speechless.

Zenitsu fainted on the spot.

Inosuke's jaw dropped. "WHAT KIND OF PUNCH WAS THAT?!"

Muichiro exhaled slowly. "That… was beyond anything I've ever seen."

Tanjiro gulped. "Saitama-san really wasn't joking when he said he's strong…"

---

The Aftermath

A massive cloud of smoke filled the horizon where Raizen had landed.

The Demon Slayers watched with bated breath.

Was it over?

Was Raizen defeated?

Then…

A deep, ragged breath echoed from the ruins.

Raizen was still alive.

Barely.

His body was completely torn apart, regenerating at a snail's pace. His arms hung uselessly, his ribcage was shattered, and his left eye was swollen shut.

Yet, despite his broken state—

Raizen laughed.

"Haha… hahaha… HAHAHAHA!"

Saitama frowned. "The hell are you laughing about?"

Raizen grinned, blood dripping from his lips.

"This… is fun."

The Hashira stiffened.

Tanjiro felt a cold shiver crawl up his spine.

Even after taking Saitama's full power punch… Raizen was still excited.

This was far from over.

To be continued…

---

End of Chapter 83